Superconductivity in the Three-Leg Hubbard Ladder: A Quantum Monte Carlo Study

Abstract

The quantum Monte Carlo method is used to investigate the superconductivity in the three-leg Hubbard ladder. The enhanced correlation for the pairing across the central and the edge chains, which has been predicted to occur in the weak-coupling renormalization as an effect of the coexistence of gapful and gapless spin modes, is shown here to persist for intermediate interaction strengths.